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The effect of crystallinity on selectivity of palladium catalysts in hydrogenation of 2-ethyl-9,10-anthraquinone
Catalysis Communications ( IF 3.7 ) Pub Date : 2020-07-30 , DOI: 10.1016/j.catcom.2020.106124
Lyudmila B. Belykh , Nikita I. Skripov , Tatyana P. Sterenchuk , Fedor K. Schmidt

The catalytic properties of palladium crystallites obtained from various precursors were studied in the hydrogenation of 2-ethyl-9,10-anthraquinone. The highest yield of H2O2 (88%) is achieved on unmodified Pd crystallites obtained from Pd(dba)2 at 50°C. A sigmoidal relationship between the coherent domain size (CDS) of Pd particles and the content of anthrones, which are by-products of the eAQ transformation, is established. Small Pd clusters, along with the reduction of eAQ carbonyl groups, accelerate predominantly the hydrogenation of the eAQH2 aromatic rings. The smallest contribution of the side processes is observed for a palladium catalyst with a CDS of 3–5 nm.



中文翻译:

结晶度对2-乙基-9,10-蒽醌加氢中钯催化剂选择性的影响

在2-乙基-9,10-蒽醌的加氢反应中研究了从各种前体获得的钯微晶的催化性能。在50°C下,从Pd(dba)2获得的未改性Pd微晶,H 2 O 2的收率最高(88%)。在Pd粒子的相干畴尺寸(CDS)和蒽酮的含量之间建立了S型关系,蒽酮的含量是eAQ转化的副产物。较小的Pd簇以及eAQ羰基的还原主要促进eAQH 2芳环的氢化。对于CDS为3–5 nm的钯催化剂,观察到副过程的贡献最小。

更新日期:2020-08-06
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